Center, Distribution Control Method, and Non-Transitory Storage Medium

2. The center according to claim 1, wherein the one or more processors are configured to, when a difference between a current version each of the one or more pieces of software of the first electronic control units that need to be updated and the latest version each of the one or more pieces of software of the first electronic control units that need to be updated exceeds a predetermined value, decide the first total data package as the distribution package.

4. The center according to claim 3, wherein the one or more processors are configured to, when a data amount of the second total data package exceeds a capacity of a data storage area included in the vehicle, decide the second difference package as the distribution package.

5. The center according to claim 4, wherein the one or more processors are configured to, when the data amount of the second total data package is equal to or smaller than the capacity of the data storage area included in the vehicle, decide, as the distribution package, one having a shorter predicted time until completion of software update from among the second total data package and the second difference package.

6. The center according to claim 4, wherein the one or more processors are configured to, when the data amount of the second total data package is equal to or smaller than the capacity of the data storage area included in the vehicle, decide, as the distribution package, one having a smaller data amount from among the second total data package and the second difference package.